113121312011 has 4 divisors (see below), whose sum is σ = 116770386624. Its totient is φ = 109472237400.

The previous prime is 113121311993. The next prime is 113121312019. The reversal of 113121312011 is 110213121311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 113121312011 - 2¹⁴ = 113121295627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113121312019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1824537260 + ... + 1824537321.

It is an arithmetic number, because the mean of its divisors is an integer number (29192596656).

Almost surely, 2^113121312011 is an apocalyptic number.

113121312011 is a deficient number, since it is larger than the sum of its proper divisors (3649074613).

113121312011 is an equidigital number, since it uses as much as digits as its factorization.

113121312011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649074612.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 113121312011 its reverse (110213121311), we get a palindrome (223334433322).

The spelling of 113121312011 in words is "one hundred thirteen billion, one hundred twenty-one million, three hundred twelve thousand, eleven".